The characteristic features of the TPedge module technology are the local fixing of the cell array – without lamination – and a glass edge sealing. The TPedge modules in the full-format measuring 1636 mm x 985 mm were subjected to the mechanical load test up to a force measuring 2400 N/m2 and the hail impact test with ball speeds of 23 m/s.
The tests that were performed on two TPedge modules were based upon the requirements as set out by the IEC 61215 Standard. No loss in performance could be detected on the modules following testing in the accredited "TestLab PV Modules" at Fraunhofer ISE. Losses in performance of up to five percent are permitted in the complete test sequence in accordance with the standard. According to a "TestLab PV Modules" statistic, approximately ten percent of module failures that occur during the certification tests are as a result of the mechanical load and hail impact test. The "TestLab PV Modules" in Freiburg is operated by the Fraunhofer Institute for Solar Energy Systems ISE and the VDE Testing and Certification Institute.
Cost reductions in module production with TPedge
The TPedge module is a joint development by Fraunhofer ISE in Freiburg and the Bystronic glass Group on the basis of a Fraunhofer patent. The wafer-based solar module can be produced much quicker and less expensively than standard wafer modules. The time and cost savings are a consequence of a simplified modular structure and a completely innovative production technology. "The cell array is locally fixed between two glass plates", says Dr. Harry Wirth, Head of Group Photovoltaic Modules, Systems and Reliability at Fraunhofer ISE. "The utilisation of foils and the associated laminating are not necessary." The edge sealing of the TPedge module is carried out via the application of the thermoplastic material TPS® at 130°C, even an additional aluminium frame is not necessary. Tobias Neff, Solar Product Manager at Bystronic glass explains: "The TPedge technology reduces the costs of the module production by 30 to 40 percent – at an aspired cycle time of 45 seconds per module line. As a result, the overall costs of a PV module can – depending upon the cost proportion of the solar cells – be reduced by approximately 14 percent."
Innovative leap in module production
The production lines for TPedge modules can be designed in various expansion stages. In the serial production line, it is possible to manufacture a module in less than a minute – compared to the 16 minutes required for the usual standard procedure. The new production principle is inspired by the sealing technology used in insulating glass production. The development of the TPedge process for the production of modules with thermoplastic sealing on the glass edge represents a great innovative leap in module production. Fraunhofer ISE and Bystronic glass will manufacture approximately 200 TPedge modules in 2012 designated for the façade of a new Institute laboratory. The project aims to further develop and demonstrate the TPedge technology and is being supported with funds from Germany's Federal Environment Ministry.
About Bystronic glass
Bystronic glass is the most competent and reliable partner for services, machinery, plants and systems in the glass processing sector. Bystronic glass supplies its well-proven machine technologies also in important areas of the photovoltaic industry. This includes preprocessing, front-end and back-end solutions. Bystronic glass is an international brand with globally operating companies that support their customers on site and through own sales and service companies. Since 1994, Bystronic glass is part of the Conzzeta AG, a renowned Swiss industrial holding company.
About Fraunhofer ISE
With a staff of 1100, the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg is the largest European solar energy research institute. It creates technological foundations for supplying energy efficiently and on an environmentally sound basis in industrialized, threshold and developing countries. To this purpose, the Institute develops materials, components, systems and processes for eight different business areas. Fraunhofer ISE operates several accredited testing centers.
Bystronic glass contact person for further information:
Tobias Neff, Product Manager Solar
Bystronic Lenhardt GmbH
Phone +49 (0) 7234 / 601-320
Fraunhofer ISE contact person for further information:
Phone +49 761 4588-5544
Bystronic glass media contact
PR / Online Communication Bystronic glass
c/o Bystronic Lenhardt GmbH
Phone +49 (0)7234 601 120
Fax +49 (0)7234 601 114
Fraunhofer ISE media contact:
Head of Press and Public Relations
Phone +49 761 4588-5147